// The NSpring Framework for .NET
// Copyright (c) 2003, Jeffrey Varszegi
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// 
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// list of conditions and the following disclaimer.
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namespace NSpring.Logging.Common.Pattern.Patterns {

using System;
using System.Text;

using NSpring.Logging;

/// <summary>
/// <para>
/// A pattern for constructing pattern summaries (for instance, for use in constructing
/// email subject lines).
/// All underlying pattern-related code is subject to change without warning
/// or deprecation, and should not be called directly by application code
/// </para>
/// </summary>
internal sealed class SummaryPattern : Pattern {
    private const string BLANK_STRING                   = "";

    public SummaryPattern(string source) : base(source, true, true, false, true, false) {}
    
    public override string Format(Event e) {
        StringBuilder sb = new StringBuilder(80);
        Token token;
        for(int x = 0; x < tokens.Length; x++) {
            token = tokens[x];
            switch (token.Type) {
                case TokenType.Text                 : {
                    sb.Append(token.Text);
                    break;
                }
                case TokenType.Separator            : {
                    sb.Append(token.Text);
                    break;
                }
                case TokenType.ContextProperty     : {
                    token.Format(e, sb);
                    break;
                }
                case TokenType.EventProperty       : {
                    token.Format(e, sb);
                    break;
                }
                case TokenType.Message              : {
                    ((MessageToken)token).Format(e, sb);
                    break;
                }
            }
        }
        return sb.ToString();
    }
    
    public override void Format(Event e, StringBuilder sb) {
        Token token;
        for(int x = 0; x < tokens.Length; x++) {
            token = tokens[x];
            switch (token.Type) {
                case TokenType.Text                  : {
                    sb.Append(token.Text);
                    break;
                }
                case TokenType.Separator            : {
                    sb.Append(token.Text);
                    break;
                }
                case TokenType.ContextProperty      : {
                    token.Format(e, sb);
                    break;
                }
                case TokenType.EventProperty        : {
                    token.Format(e, sb);
                    break;
                }
                case TokenType.Message              : {
                    ((MessageToken)token).Format(e, sb);
                    break;
                }
            }
        }
    }
    
}

}
